Waterproof Handheld pH / mV / Dissolved Oxygen / Temperature Meter à¤Ã×èͧÇÑ´¤èÒ¾Õàͪ âÍÍÒÃì¾Õ ÍÍ¡«Ôਹ㹹éÓ ÍسËÀÙÁÔ ÃØè¹ PD 450 Brand EUTECH Waterproof Handheld Meter PD 450 Product Features pH / mV / Dissolved Oxygen / Temperature Affordable optical RDO technology reduces maintenance time and costs Maintenance free optical probe with no electrolyte eliminates hassle of replacing delicate membranes and salt build up from refillling solutions Switch between pH, mV, % saturation and mg/L (ppm) dissolved oxygen – With the press of a button Durable waterproof and dustproof design with IP67 rating Large, backlit graphic display provides measurement with temperature Calibrate up to 5 points automatically with USA or NIST buffer groups (up to 6 points with DIN). New manual option allows calibration with up to 5 custom buffer standards Auto buffer recognition – Automatically identifies the correct pH buffer for rapid calibration Calibration due alarm – Set a visible reminder when it is time to recalibrate the meter Selectable ºC or ºF – Choose units to best fit your application Ready indicator, manual or automatic measurement hold feature and optional automatic shutoff function Store up to 500 data sets – Easy USB or RS232 output with optional data cables Built-in real-time clock stamps stored data and calibration data with time and date – Meets standards for GLP (Good Laboratory Practices) Product Specification Description pH Range -2.00 to 16.00 pH Resolution 0.01 pH Accuracy ±0.01 pH Calibration Up to 6 points: USA, NIST, DIN or custom mV Range ±2000 mV Resolution 0.1 mV ±999.9 mV; 1 mV beyond Accuracy ±0.2 mV +2 LSD or +0.5 % of reading; whichever is greater Calibration ±200 mV Dissolved Oxygen Range 0 to 200 %; 0 to 20 ppm/mg/L Resolution 0.10 %; 0.1 ppm/mg/L Accuracy ±2 %; ±0.1 ppm or mg/L up to 8; ±0.2 ppm or mg/L above 8 Calibration Zero and saturation Temperature Range -10.0 to 110.0 ºC (14.0 to 230.0 ºF) Resolution 0.1 ºC/ºF Accuracy ±0.5 ºC; ±0.9 ºF Calibration Offset in 0.1 increments, ±10 ºC or ±18 ºF Others Display Custom LCD with backlight Memory Stores up to 500 data sets Output USB or RS232 Real-Time Clock Time and date stamp on calibration and stored data Temperature Compensation Automatic or manual from -10 to 110 ºC Pressure & Salinity Compensation Manual Power Two AA batteries (included), >100 hours (without backlight); AC adapter (optional) Dimensions (L x W x H) Meter: 7 7/8" x 3 1/8" x 2 1/4" (20 x 8.3 x 5.7 cm) Boxed: 9 1/8" x 9 1/8" x 2 3/4" (23 x 23 x 7 cm) Weight Meter: 1 lb (0.5 kg) Boxed: 1.4 lb (0.7 kg) DO Meter Eutech ORP Meter PD 450 pH Meter